We could go on and on, I suppose, but the items listed in the article and comments so far are certainly valid ones. A couple of basic "fabrication tools" that are vital, though, and that without them, even the cardboard is only 10% useful: a ruler and a pencil. Now, the commenters can jump on about the various versions of "ruler" and different types of marking devices. But I submit that if you are going to snip, cut, file, bend, drill and otherwise fabricate anything, you need to start with measuring and marking some stuff! 😎
It's a decent size two-car garage and it's extraordinarily congested. All my machines are fully tooled and powered up but there's no room left for any bench work. You might be impressed with how much equipment you can cram into a space if you don't insist on a path through it all.